What are cipher languages?

People who have developed a cipher language know how difficult it is to do so. One way is to attach a certain syllable after vowels: such as ‘sche’ after a, ‘blo’ after ‘e’, ‘ning’ after ‘u’, and so on. ‘Apple pie’ then becomes ‘Ascheppleblo pieblo’. If you do not know how to decipher the text, it is almost impossible to understand what is written. In 1941, the Japanese secret service cracked the code used by the Americans, and Japan attacked USA. The Navajo – Indians in the US offered to develop a new radio code from their language, which was understood only by the Navajo at that time. No one was able to decode this till the end of the war.